Finding the Fourth Proportional to 2,111.81, 3,168.20 and 957.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,111.81 : 3,168.20 = 957.56 : x
2. Step 2: Convert to fraction form
   2,111.81/3,168.20 = 957.56/x
3. Step 3: Cross multiply
   2,111.81x = 3,168.20 × 957.56
4. Step 4: Simplify right side
   2,111.81x = 3,033,744.72
5. Step 5: Solve for x
   x = 3,033,744.72/2,111.81
6. Step 6: Final answer
   x = 1,436.56